赤经

任何一个参考星的赤经或赤纬偏差超过这个值将被拒绝进行天文测量处理。

Any reference star that if found to show larger residual in either Right Ascension or Declination will be rejected from the astrometric solution .

这种天体被观测到之后，他们的赤经和赤纬坐标就会公布出来，以便他人观测。

When such new objects are announced , right ascension and declination coordinates are normally given to allow other people to locate the object .

还推导了子午方向观测中由于过任一天体的赤经圈投影与子午面之间夹角的变化对量度坐标x测定值的影响，所有这些都是由于转轴观测和星象偏离芯片相对中心引起的。

The influence of the variation in the angle between the projection of the right ascension circle of an object and the meridian plane on the determined value of the measured coordinate x during the observation of the star carried out in the meridian direction is also derived .

本文给出了紫台光电中星仪1980&1985年的观测归算到FK5（J2000.0年）星表系统的508颗恒星的赤经改正。

The correction in right ascension of 508 stars determinated with PMO photoelectric transit instrument in 1980 & 1985 to FK5 system is given in the paper .

导航星表由1532颗导航星构成，存储导航星的赤经、赤纬、星等信息，大小为20.9k；

The guide star catalogue contains of 1532 guide stars , and stores longitude , latitude and starlight of guide star , and it take up 20.9k storage .

你最好过来看看赤经。

You better take a look at the right ascension .

按赤经、赤纬方向测定三角视差的系统差问题

On the systematic difference between trigonometric parallaxes determined in right ascension and declination

一个可以有相当赤经追踪精确度的摄星用赤道仪。

A photographic equatorial mount capable of reasonable accurate tracking of the RA-axis .

中国古代使用一个完整的赤道坐标系来表达恒星位置，赤经、赤纬和分点的概念都是十分清楚的。

There was a complete equatorial coordinate system on the sky in ancient China .

紫台光电中星仪测定的508颗恒星的赤经改正

The correction in right ascension of 508 stars determinated with PMO photoelectric transit instrument

由于不需通过计算去求赤经，因而这是一个简单而又经济的方法。

The method needs not to compute the right ascension , so it is very simple and economical .

首先研究了通过改变轨道半长轴调整航天器升交点赤经变化率，进而控制轨道法向振幅的方法；

First , a new method of controlling the swing of orbit normal axis by changing the semi studied ;

这个位置也以天球坐标形式显示在右下角（赤经和赤纬）。

The location is also noted in the lower right corner in celestial coordinates ( Right Ascension and Declination ) .

文章对半长轴、偏心率、倾角、升交点赤经相近的两航天器的远距离轨控接近方案进行了理论分析。

The orbit control technology of two long-distance satellites with similar semi-major axis , eccentric angle and inclination RAAN was analyzed .

工作在调相状态下的旋转变压器可以用其相位模拟恒星时与赤经、时角的关系。

Phase modulated resolvers can be used to model the relation between the sidereal time , right ascension and the hour angle .

大型反射子午环是用来绝对测定恒星赤经和赤纬的仪器。

A large reflect meridian circle is an instrument for the absolute determination of the declination and right ascension of a star .

另外，平面外倾角调整应尽可能在近地点和远地点完成，以使对升交点赤经的影响最小。

Moreover , out-plane inclination maneuver should be completed at perigee or apogee to influence right ascension of ascending node the least .

设定赤经&在校准好极点以后，观测者必须利用计算机或已经同步好恒星时的装置设置好赤经圈。

Setting Right Ascension-After polar alignment , the observer uses a calculator or a known star to synchronize the right ascension circle with Sidereal Time .

本文利用极坐标下斯涅尔定律，系统地讨论了电离层折射对赤经赤纬的修正问题，并据此给出了射线描迹法。

Using the Snell 's law in polar coordinates , the ionospheric refraction effects on the declination and right ascension determination is discussed in this paper .

双环中间夹着一根装有十字丝装置的窥管，相当于单镜筒望远镜，能绕赤经双环的中心转动。

The double-ring holds within itself a sighting tube with crosshairs ， which equals to a monocular and revolves around the center of the right ascension double-ring .

赤经环与金属轴相交于两点，一点指向北天极，另一点指向南天极。

The Chijing ring and the metal axis intersected at two points ， with one pointing to the North Pole and the other to the South Pole .

另一个是直立在赤道环中心的双环，能绕一根金属轴转动，叫做“赤经双环”。

and the other is a double-ring which is per-pendicular to the center of the equatorial ring ， revolving around a metallic shaft ， and is called " right ascension double-ring .

利用计算机完成天文定位中的太阳赤经、赤纬、太阳格林时角、春分点格林时角、测者地方时角的计算。

How to complete the calculation of sun declination , sun right ascension , sun greenwich hour angle , greenwich hour angle of aries and sun local hour angle in Astronomical Position .

最外面的那个圆环固定在正南北方向上，叫做“子午环”；中间固定着的圆环平行于地球赤道面，叫做“赤道环”；最里面的圆环可以绕金属轴旋转，叫做“赤经环”；

The outermost ring-meridian ring-was fixed in the north-south direction ， the middle ring-equator ring-was parallel to the earth 's e-quatorial plane ， and the innermost one-Chijing ring-could revolve around the metal axis .

在轨道六要素的基础上，分析了卫星太阳同步轨道设计时降（升）交点地方时、升交点赤经，以及冻结轨道参数等的确定方法。

The determination method of descending / ascending node , longitude of ascending node and frozen orbit parameters for sun-synchronous orbit satellite design was analyzed on the basis of six general orbital elements .

观测时，将窥管对准某颗待测星，然后在赤道环和赤经双环的刻度盘上直接读出这颗星星的位置值。

During observation ， the sighting tube is targeted at a certain star , thus the positional value can be read out at the dials of the equatorial ring and the right ascension double-ring .

他用其中一个仪器测量两个天体的赤经差，用另一个仪器测北极与某颗星的角距离。

he used one of these to measure the difference in right ascension between two celestial bodies and another one to find the angular distance from the celestial north pole to a given star .

在轨道关联中考虑到初轨计算的误差特征，选取近地点高度、轨道倾角和升交点赤经作为用于关联的轨道量。

The height of perigee , inclination and right ascension of ascending node ( RAAN ) are chosen as characteristic quantity in the orbit correlation considering the character of the error of IOD process .

文章分析了月球在一个恒星月内位置变化与相应的地月转移轨道升交点赤经和近地点幅角变化的关系，在这个基础上讨论了发射机会和发射窗口问题。

The relation of the right ascension and argument of perigee of the required orbit with the lunar position is derived within one lunar month . Based on this relationship the launch opportunity and launch window are discussed .

根据经纬仪的光学和机械构造，提出一种有10个误差参数的经纬仪静态系统差模型。又根据星表中的恒星沿赤经基本均匀分布的特点，提出一种快速查找指定恒星的方法。

According to the structure on optics and mechanism of theodolites , a model with 10 error parameters for static systematic errors of theodolites is proposed . Further , a method for fast searching appointed stars is derived .